[out] Pointer to a buffer
that receives the list of all archive types supported by the plug-in formatted
as COMMATEXT.
The archive types are represented as file masks. For example, CAB archives
will be represented as "*.CAB" (without the quotes). SZDD archives
(archives created using Microsoft's COMPRESS.EXE program) will be represented
as "*.??_". This assures that archives will always be correctly
identified, even if the archive extension is variable, as in the SZDD
archive type.
Pass
NULL in this parameter to request
the required size for the buffer.